| 631 | 09 May 26 | Lynwood 5K/10K | 5K/10K | Lynwood, CA |
| 632 | 09 May 26 | Night Nation Run - Orange County | 5K | Costa Mesa, CA |
| 633 | 09 May 26 | Dirty Secret Trail Run | 5.8M/10.3M | Cool, CA |
| 634 | 09 May 26 | Dream Run | 3K/5K | Irvine, CA |
| 635 | 10 May 26 | 2026 Folsom Lake Sprint & Super Sprint Triathlon - Sunday | triathlon | Granite Bay, CA |
| 636 | 10 May 26 | Folsom Lake Triathlons | Sprint/supersprint triathlon | Granite Bay, CA |
| 637 | 10 May 26 | Liberty Station Half/Full Marathon Relay, Solo Half & 5K Runs | 5K/13.1M/26.2M | San Diego, CA |
| 638 | 10 May 26 | Happy Mothers Day 5k, 10k, 15k, Half Marathon | 5K/10K/15K | Van Nuys, CA |
| 639 | 10 May 26 | Happy Mothers Day Half Marathon | 5K/10K/15K/13.1M | Van Nuys, CA |
| 640 | 10 May 26 | Silicon Valley Kids Triathlon | youth triathlon | San Jose, CA |
| 641 | 10 May 26 | MVRRC 7th Annual Mother's Day 5K fun Run event | 5K | Perris, CA |
| 642 | 10 May 26 | MVRRC Mother's Day 5K | 5K/10K | Perris, CA |
| 643 | 10 May 26 | Run for the Rose | 5K/10K/15K/13.1M | Long Beach, CA |
| 644 | 10 May 26 | Bakersfield Mothers Day Run | 5K | Bakersfield, CA |
| 645 | 10 May 26 | Mothers' Day Crissy Field 5K | 5K | San Francisco, CA |